Some more info here coil to buy question info on what kind of coil to get, but also has details on doing the green wire fix. Wish I had found this post before doing mine, I almost did it the same way.

SC fuel pump problems info on checking electrical connections.

Clean and service distributor

Clean and service distributor


and some info on finding top dead center



A post on timing, this post describes how to find TDC on cylinder 1 on compression to make sure the distributor is in the right location.


Info on timing, and mixture adjustment

More info on the green wire, also a tip on checking the wiring through the firewall under the dash, seems these can come loose and cause similar electrical problems.

Although I have checked the wire (ohm meter should have read 600ohm, but was 1, must be touching)

3 911 SC died won't restart

Timing software, this is a windows program for slotcars

Lap Timer 2000, Gregory Braun software

This link

6-pin SC/Turbo CDI unit repair documentation

Has more info on the green wire with more schematics.

8/10/2008

More info on the green wire fix

Pelican posts

in this  

The Green wire...

this info on making the splice

If you can find a new connector [VW or Porsche dealer, maybe] that plugs into the pickup coil connector at the distributor, and some RG-58 or RG-174 coax at Radio Shack ... you can attempt building a replacement. Putting reliable, secure connectors onto coax is a bit of an art ... we aren't talking about an 'F' connector for a TV!

The connection at the CDI unit requires uninsulated 0.25" Fastons to replace the ones you remove from the 6-pin connector ... again, not your typical connector on coax, but it is doable. To put ends on coax reliably, you need to strip back 2" - 3" of insulation, use a pen to force a hole in the braid -- enlarge the hole without tearing the wires in the braid, pull the center wire out through the hole, then pull out the braid to one side and twist so you have two stranded wires to terminate. Both ends of the coax need to be prepped this way.

My choice would be RG-180 Teflon-insulated coax, as the PVC sheath on RG-58 & RG-174 coax really isn't up to the underhood temps of a 911!

What you want to test for at pins #7 & #31d at the CDI connector [other end of green coax] is 600 Ohms resistance +/- 10% at room temp.